Search for dissertations about: "adaptive mesh refinement"

Showing result 11 - 15 of 36 swedish dissertations containing the words adaptive mesh refinement.

  2. 11. Goal-Oriented Adaptive Finite Element Analysis in Computational Material Mechanics

    Author : Fredrik Larsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; visco-plasticity; a posteriori error estimation; thermo-elasticity; mesh refinement; adaptivity; FEM; elasticity;

    Abstract : This thesis is concerned with error control in computational material mechanics. A posteriori error estimation and adaptivity for finite element discretizations is investigated. Based on the technique of solving a dual problem, it is possible to control the accuracy of arbitrary quantities. READ MORE

  4. 12. Adaptive Algorithms for Deterministic and Stochastic Differential Equations

    Author : Kyoung-Sook Moon; KTH; []
    Keywords : adaptive mesh refinement algorithm; a posteriori error estimate;

    Abstract : .... READ MORE

  5. 13. Convergence rates of adaptive algorithms for deterministic and stochastic differential equations

    Author : Kyoung-Sook Moon; KTH; []
    Keywords : adaptive mesh refinement algorithm; computational complexity; a posteriori error estimate; ordinary differential equations; stochastic differential equations;

    Abstract : .... READ MORE

  6. 14. Efficient Partitioning of Dynamic Structured Grid Hierarchies

    Author : Johan Steensland; Michael Thuné; Jarmo Rantakokko; Charles Norton; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; scientific computing; partitioning; structured grids; adaptive mesh refinement; dynamic load balancing; Beräkningsvetenskap; Scientific Computing;

    Abstract : This thesis aims at decreasing execution time for large-scale structured adaptive mesh refinement (SAMR) applications executing on general parallel computers. The key contributions are (1) A conceptual dynamically adaptive meta-partitioner able to select and configure an appropriate partitioning technique, based on application and computer state, and (2) A characterization of new and existing domain-based partitioners, enabling a mapping from application and computer state onto appropriate partitioners, and (3) Sketched scalable solutions, expressed in terms of natural regions and expert algorithms, for the problem to efficiently partition large-scale SAMR applications with deep grid hierarchies executing on general parallel computers, and (4) A software partitioning tool Nature+Fable, implementing the greater parts of these sketched scalable solutions and engineered as part of the meta-partitioner. READ MORE

  7. 15. High Performance Adaptive Finite Element Methods : With Applications in Aerodynamics

    Author : Niclas Jansson; Johan Hoffman; Johan Jansson; Vincent Heuveline; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The massive computational cost for resolving all scales in a turbulent flow makes a direct numerical simulation of the underlying Navier-Stokes equations impossible in most engineering applications. Recent advances in adaptive finite element methods offer a new powerful tool in Computational Fluid Dynamics (CFD). READ MORE